Staybolt structure for boilers



J. R. FLANNERY AND E. l. DODDS. STAYBOLT STRUCTURE FOR BOILERS.

APPLICATION HL D APR 1 1,354,609, Patented Oct. 5, 1920.

III

JOHN ROGERS FLANTNERY AND ETHAN I. DODDS, OF

PITTSBURGH, PENNSYLVANIA,

ASSIGNORS T0 FLANNERY BOLT COMPANY, OF PITTSBURGH, PENNSYLVANIA.

STAYBOLT STRUCTURE FOR BOILERS.

Application filed April 19, 1919.

To all whom it may concern 7 Be it known that we, JOHN RocERs F LAN- NERY and ETHAN I. Donns, citizens of the United States, and residents of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Staybolt Structures for Boilers; and we do hereby declare the'following to be a full, clear, and exact description of the invention, such as Wlll enable others skilled in the art to which it appertains to make and use the same.

.This invention relates to'improvements 1n staybolt structures for boilers,-one object of the invention being to provide a structure which will facilitate the assembling and aproper alining of the bearings for the headed ends of the bolts when the outer and inner boiler sheets are not parallel with each other and to provide, in such a structure, simple means for turning the staybolt to screw the inner end of the same through the inner boiler sheet.

WVith this and-other objects in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings: Figure 1 is a sectional view illustrating one embodiment of our invention, and Fig. 2 is a view showing a modification,

1 represents an outer boiler sheet which, in'the present instance may be the roof sheet, and 2 represents the inner boiler sheet. The outer or roof sheet is made with openings each of which has a wall 3 which is curved transverselyviz., in a direction extending from one face of the sheet toward the other-and constitutes a bearing or socket seat in the boiler sheet for a partly spherical or spheroidal sleeve or bushing 4 so that the latter shall be capable of universal movement,the connection of the sleeve or bushing member with the boiler sheet thus being of the ball-and-socket type. The partly spherical sleeve or bushing is made with an opening 5 therethrough which is of greater diameter at its outer than at its inner portion, and aportion of the wall of said opening is curved in a manner to form a partly spherical bearing 6 for the curved or spheroidal head 7 at the outer end of a staybolt 8,said sleeve orbushing thus Specification of Letters Patent.

' Patented Oct. 5, 1920. Serial No. 291,181.

constituting a bearing member for the bolt head. The other or inner end of the stay bolt may be threaded to pass through the inner boiler sheet and this inner end of the staybolt may be upset against the inner boiler sheet, as shown at 9.

The outer or upper portion of the partly spherical sleeve or bushing member 4 receives a cap 10,-the peripheral portion of which may rest upon a shoulder 11 in said sleeve or bushing. The cap 10 is provided with a tongue 12 to loosely enter a slot 13 in the head 7 of the staybolt,.and it is also made with a wrench engaging portion which, in Fig. l, is shown as an angular head 14. The outer face of said cap around said angular head forms a shoulder 15, which, when the parts are assembled is disposed somewhat inwardly from the outer end of the sleeve or bushing. The annular recess thus formed between the head or enlargement on the cap and the inner wall of the sleeve or bushing receives a welding alloy, indicated at 16, which is built up therein and against the head or enlargement outwardly beyond said recess, by an electric or other suitable welding method, and thus the cap is welded to the sleeve or bushing over the bolt head.

The bolt head may be assembled in the partly spherical sleeve or bushing and the cap welded in place and the inner end of the bolt threaded at the factory ready to be applied to the boiler sheets.

In applying this structure to the boiler sheets, the bolt will be passed first through the opening in the crown sheet and its inner end caused to aline with the hole in the inner boiler sheet through which it is to be screwed. The operator will then apply a wrench to the angular head of the cap 10 and as this cap is connected with the bolt head and secured to the sleeve or bushing, a turning force applied with the use of the wrench, will cause the sleeve or bushing as well as the bolt to be turned and the inner end of the bolt to be screwed through the inner boiler sheet. As the partly spherical sleeve has a universally movable mounting in the outer or roof sheet, it will so move on its bearing in said sheet during the assembling of the staybolt structure in the boiler, that the bearing devices for the headed end of the bolt will become accurately may be rounded or beveled as at 18 to form' alined with the bolt and an accurate movthe boiler sheet will be insured. When the staybolt shall have been thus assembled between the boiler sheets, the partly spherical sleeve or bushing will be secured to the crown or roof sheet of the boiler by welding. This is effected by building up a weld 17 around the sleeve or bushing with the use of a suitable welding alloy and by an electric or other welding method. The wall around the opening in the boiler crown or root sheet an annular recessaround the sleeve or bushing into which the welding alloy will enter, and thus the sleeve or bushing will be welded, steam tight, to the boiler sheet. 7 i

In the form of the invention shown in Fig. 2, the cap member 19 is threaded into the sleeve or bushing as indicated at 20 and then welded as at 21. This cap member is made with an angular depending portion 22 entering a similarly shaped recess23 in the bolt head, and an enlargement 24 on said. cap is made with an angular recess 25 to re ceive a wrench.

Other changes might be made in the de-' tails of construction of our invention without departing from the spirit thereof or limiting its scope and hence we do not wish to restrict ourselves to the precise details herein set forth.

Having fully described our invention what we claim as new and desire to' secure by Letters-Patent, is V I 1. In a staybolt structure, the combination with a boiler sheet having an opening, of a sleeve or bushing having an initial universally movable mounting in saidboiler sheet, a Istaybolt having a head mounted in said sleeve or bushing, and a cap secured to the sleeve or bushing and engageablewith the bolt head.

g 2. In a staybolt structure, the combination wlth a boller shcethaving an open1ng,oi a

sleeve or bushing having an initial lUIU BF- 7 sally movable mounting in said opening, a staybolt having a rounded head mounted in said sleeve or bushing, and a capwelded to said sleeve or bushing over the. bolt head, said cap being engageable with the bolt head and having awrench engaging part. I

3.v In a staybolt structure, the combination with a boiler sheet having an opening, of a sleeve or bushing having an initial universally movable monnting in said opening, a staybolt having a rounded head mounted in said sleeve or bushing, a cap welded to the sleeve or bushing and engageable with the bolt head, said cap having a wrench enseat and having an interior bearing for-a bolt head, a stay bolt having a rounded head mounted on the bearing in said sleeve or bushing, a cap secured to the sleeve or bushing and engageable with the head of the bolt to turn the latter, and means securing said sleeve or bushing to the boiler sheet.

5. In a staybolt" structure, the combination with a boiler. sheet having an opening, of a sleeve or bushing having an initial universally movable mounting in said opening, said sleeve or bushing having an internal bearing for the rounded head ota bolt, a staybolt having a rounded head mounted on the bearing within said sleeve or bushing, said bolt head having a recess, a cap secured to the sleeve or bushing over the bolt head andhaving apart to loosely enter the recessin said bolt head, and means for securing the sleeve or bushing to the boiler sheet.

6, In a staybolt structure, the combination with a boiler sheet having an'opening, of a sleeve or bushing having a ball-andsocket connectionwith said boiler sheet and having an interior bearing for the rounded head ofa'bolt, ofa staybolt having a wrench head with a rounded portion mounted on the said sleeve, means for capping the sleeve and loosely connecting the same with the bolt head, means for securing the sleeve to the boiler sheet in which it is mounted, and means securing said bolt to the other boiler sheet.

In testimony whereo1 we have signed this specification in the presence of two subscribing witnesses.

/ J OHN ROGERS FLANNERY.

ETHAN I. DODDS. Witnesses: JAs. R. HORAN, F. H. ALLIsoN. A 

